Patents by Inventor Hans-Jürgen Weiss

Hans-Jürgen Weiss has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230364565
    Abstract: A stirring element device, in particular for stirring fluidized beds and/or solid matter mixtures and/or highly viscous suspensions, comprises at least one helical stirrer, which is rotatable around a rotation axis and has at least one winding that runs around the rotation axis, wherein the helical stirrer comprises a base body, which has in at least one cross-sectional view an at least section-wise oval, in particular circle-shaped, outer contour.
    Type: Application
    Filed: September 6, 2021
    Publication date: November 16, 2023
    Inventors: Hans-Jürgen WEISS, Benjamin MULTNER, Wolfgang KELLER, Wolfgang LAST
  • Patent number: 11059006
    Abstract: An agitator device, in particular a draft tube agitator device, with at least one stirring unit, which is rotatable around a rotary axis, which is configured for conveying a fluid in an axial conveying direction and which includes at least one rotor blade element, the projection of said rotor blade element onto a plane that is perpendicular to the rotary axis having an at least substantially circular-arc-shaped outer contour, the rotor blade element comprises at least one first region, which is situated in a blade plane and is at least substantially planar, and includes a second region, which is curved out of the blade plane.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: July 13, 2021
    Assignee: EKATO Rühr- und Mischtechnik GmbH
    Inventors: Nicole Rohn, Hans-Juergen Weiss, Bernd Nienhaus
  • Publication number: 20180345233
    Abstract: An agitator device, in particular a draft tube agitator device, with at least one stirring unit, which is rotatable around a rotary axis, which is configured for conveying a fluid in an axial conveying direction and which includes at least one rotor blade element, the projection of said rotor blade element onto a plane that is perpendicular to the rotary axis having an at least substantially circular-arc-shaped outer contour, the rotor blade element comprises at least one first region, which is situated in a blade plane and is at least substantially planar, and includes a second region, which is curved out of the blade plane.
    Type: Application
    Filed: November 10, 2016
    Publication date: December 6, 2018
    Inventors: Nicole ROHN, Hans-Juergen WEISS, Bernd NIENHAUS
  • Patent number: 7677788
    Abstract: The aim of the invention is to improve an existing mixing device in such a manner that for a predetermined reactor length, retention time is increased and the material which is to be processed is transported at essentially the same speed irrespective of the radial distance thereof from the rotational axis. As a result, at least one row of blades is arranged on each shaft and each row of blades comprises at least two individual blades and the blades are fixed to the shaft at an incidence angle ? in relation to the longitudinal axis of the shaft. The blades are curved in themselves, such that the blades form an angle of incidence ? at the fixing point on the shaft and an angle of incidence ? on the outer diameter DA.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: March 16, 2010
    Assignee: Lurgi Lentjes AG
    Inventors: Hans-Jürgen Weiss, Udo Zentner, Burghard Neumann, Jörg Schmalfeld
  • Patent number: 6841064
    Abstract: Residual oil from the processing of crude oil, natural bitumen or oil sand is mixed in a mixer with granular, hot coke as heat carrier (heat carrier coke) in a weight ratio of 1:3 to 1:30, where on the granules of the heat carrier coke there is first of all formed a liquid residue film which partly evaporates in the mixer. Gases and vapors and moist, sticky coke are withdrawn from the mixer. The mixture of coke and residual oil is introduced into a subsequently connected stirred tank in which the mixture slowly moves downwards while being stirred mechanically at a temperature of 450 to 600° C. and preferably at 480 to 550° C. Dry, flowable coke is withdrawn from the stirred tank. Usually, the dwell time of the heat carrier coke in the stirred tank is 1 to 30 minutes.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: January 11, 2005
    Assignee: MG Technologies AG
    Inventors: Hans-Jürgen Weiss, Ingo Dreher, Udo Zentner
  • Patent number: 6469203
    Abstract: The present invention relates to a process of recovering monomeric esters of substituted or unsubstituted acrylic acid from polymer material having corresponding structural units by depolymerization by means of a fine-grained heat-transfer medium which is maintained above the depolymerization temperature of the polymer material. In a reactor, the polymer material is brought in contact with hot, mechanically fluidized heat-transfer medium. The resulting vapors are withdrawn and condensed, where the hot heat-transfer medium is continuously supplied at one end of the reactor, and cooled heat-transfer medium is discharged at the other end.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: October 22, 2002
    Assignees: Metallgesellschaft Aktiengesellschaft, Rohm GmbH Chemische Fabrik
    Inventors: Hans-Jürgen Weiss, Jörg Schmalfeld, Udo Zentner, Tobias Groschang, Udo Gropp, Werner Fuss, Ralf Goedecke, Egbert Schöla
  • Patent number: 6413415
    Abstract: High temperature flash distillation, for treating residual oils originating from crude oil refining, natural bitumen and/or tar sands, comprises feeding the oil to a mixer with granular hot coke, which serves as a thermal transfer medium. In mixing, 60-90% of the oil is vaporized. The non-vaporized fraction includes metal-containing asphaltenes. This fraction is further converted in the mixer, to oil vapor, gas and coke. Gases and vapor are withdrawn from the mixer, separately from the coke. The vapor phase is cooled and condensed to produce product oil. The gas itself is a further product. The coke is reheated and recycled to the mixer as the thermal transfer medium.
    Type: Grant
    Filed: January 3, 2000
    Date of Patent: July 2, 2002
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Hans Jürgen Weiss, Jörg Schmalfeld, Udo Zentner, Ingo Dreher, Willibald Serrano